Still dealing with this issue with the 1993 acty. More of what I did in the description. This only happens AFTER it reaches operating temperature.
Removed and cleaned the carb, bench tested both solenoids and they work, confirmed the diaphragms work. Replaced all vacuum lines. Removed the catalytic converter and it came apart, gutted it, reinstalled and still no change. Fuel pressure is just over 400cc per minute per the service manual fuel pump test. Clean fuel filter.
Next I think I should replace the ignition control module, fuel cut relay, and slow cut unit carburetor controller.
I want to start with at least the cheaper replacement options before replacing the entire carburetor for a possible internal issue I’m not finding.
Idles perfectly fine at operating temp. Compression test is 153, 161, and 157 on cylinders 1-3.